Rotary engine.



A. E. MILLER. ROTARY ENGINE. APILIQATION FILED MAY8,1908.

Patented Dec. 29, 1908.

and

A. E. MILLER. ROTARY ENGINE. APPLICATION FILED MAY8,1908.

9 7;'343, Patented Dec,,29,1908.

2 SHEETS-SHEET 2.

PATENT OFFICE.

usrnv E. MILLER, or RURAL RETREAT, VIRGINIA.

noramr ENGINE.

v v No. 907,843.

Specification of Letters Patent.

Patented Dec. 29,1908.

Application filed. May 8, 1908. Serial No. 431,6d0.

Torall whom it may concern:

' Be it'known that I, AUSTIN E. M LLER, a citizen of the United States,residing at Rural Retreat, in the county of Wythe and State of-Virginia,, have invented a new. and useful Rotary Engine, of which thefollowing 1s 8f P 01fiCat10n. a

This invention relates "to. rotary engines with special rreferenge torotary engines ofth'e compound type. 1 v

' The invention further relates to combined rotary engines and turbines.--One ob eot of the invention isto'provide an improved generalconstruction of a rotary .englne.

Another object of thejinvention is to provide a sliding piston of.improved 1 form actuated by the steam-pressure.

A still further object or the invention a to provide an improved 'form"of combined rotary engine and turbinejin' which the exhaust fluidpressure from the rotary engine will be utilized to actuate the turbine;

The invention consists in general 'of a rotary engine mounted in(SOIHIBGUOH with a turbine, sald rotary engine being provided 'withexhaust ports and passages leading to the nozzle of a turbine mountedupon the same shaft. ,The invention further consists in such noveldetails of arrangement, and combination of arts hereinaftenfullydescribed, illustrated in the accompanying drawings, andspecificallysetforth in the claims.

In the accompanying drawings like char acters at reference indicate likeparts in several views. g

Figure '1 is a sideelevation. of an engine constructed inaccordance'with this invention. Fig. an end elevation thereof. Fig. 3isa vertical section of the invention showing the valve and sliding.piston I arrangenient in the rotary engine. F1g. 4 is atransversesectionv part1 in elevat on showing the arrangement ofrotary'eng' ne and turbine Fig. '5 is a partial sect onal view throughthe turbine showing. the nozzle,

blades, and exhaust.

The numeral ,10 indicates a cylindrical casing in which the rotary partsare heldto move. Uponeither side. of the casing 10 are heads 11 providedwith aperturedlugsl? and downwardly extending portions 13 being-arrangedto form a base or frame [or said engine.

Within the apertured lugs 12 are held lar form arranged to contact withthe cylindrioal casing 10' and thus prevent thefesca e of steam fromoneport to the other." The central portion of the rotorfwhich lieswithin the turbine is in the formof a solid web and is keyed securely tothe shaft 15 asbest seen in-Fig. 5. The portionsl? of the rotor arecentrally. recessed as shown in Fig. 3 and eachof said portions isprovided with steam passages 19 having enlarged shouldered porionsf20.It is preferred that the steam passagps in one of the portions 17 shalllie at 5 other ortions 17 as indicated by the dotted and in lines inFig. 3. Rigidly attached to each of the plates forming the heads 11 is aboss 21 which extends within the recess in the center of the portion 17.The boss 21 is provided with arms 22- arranged to contact withthe sidewalls of said recess. By the peculiar arrangement of the lugs 22thecentralrecesses are each divided into four parts two of which form steampassages 23' and the other two exhaust passages 24.

Between the casing 10 and the rotor 1por-v tions 17 are formed annularspaces 25 w ich are broken by fixed abutments 26 referably disposedopposite each other an provided with an' inc med face 27. Hold withinand closely fitting the passages 19 and 20 are pistons 28' havingshouldered ortions 29 wthich lie within the portion 20 o the recess. Theshouldered portions 29 are-of less length then the portion '20 of therecess and it is therefore possible for the piston to slide in and'out,the motion being limited .;by the coaction of the shoulderedportion 29and enlarged" ortion 20 ofthe recess.- The piston 28 is he low asindicated at 30 and is provided t angles to the steam passages inthewith an opening 31 arranged to permit the passage of steam through tis slidably mounted a valve 34. Openi g episton and into". the annularrecess 25. Fixedly mountedwhile the exhaust steam ahead of the pistonaway to any suitable point.

I into the recess 23 is a steam port 35 which is supplied with steam bymeans of a pipe 36.

40 formed on the exterior of said casing.

'1 his passage 40 is so positioned as to conduct the steam passingthereto to a nozzle 41 lying adjacent the path of the-turbine blades 42.Exhaust ports 43 are also formed inthe casing one of said ports beingrearwardly disposed with reference to each of the nozzles 41. Theexhaust ports 43 communicate with exhaust pipes 44 which may-connectwith the exhaust pipes-38 or be separate as desired. p

In the operation of the device steam is admitted to the steam pipes 86ports 35 and passage 23. From the passage 23 the steam passes throughthe recess 19 and the hollow pistons, the valve '34 being forced open bypressure of the steam. "lhe steam then passes out of the opening 31 andcauses the rotor to move. It is to be observed that while the steam ispassing through the hollow piston a certain amount of pressure willcontinue to be exerted against the valve 34 and the piston will thus beforced outward againstthe casing 10. The continuance of the revolutionbrings the passage 19 opposite one of the lugs22 and then opposite theexhaust passage 24. -When the piston arrives at this point steam isexhausted through the ports 37 and pipes 38. The valves 34 will thenclose, and, the pressure having been removed the pistons 28 will nolonger be forced out against the casing 10 but will be readily forcedback by the inclined face 27 of the abutment 26. As soon, however, asthe piston passes the stationary abutment, the steam will again open thevalve 34 and forces the piston out again the casing 10. M h

has been forced outward through the steam ports 39 and passage 4-0and'into the nozzle 41 Where it serves to actuate the turbine element.This steam after acting upon the turbine element is exhausted throughthe port 43 and pipe 44.

It is obvious that on some forms of the engine one of the pistons 28with the corresponding parts may be omitted and also that i on largerengines, where desirable, the numsenses ber of pistons, 28 andcorresponding parts may be increased without affecting the scope .of theinvention.

Having thus described the invention what is claimed as new is 1. In anengine of the class described, a rotor comprising a central turbinemember anda pair of laterally disposed piston actuated members rigidlyconnected thereto, and a casing having inlet ports to admit steam to thepiston actuated members of the rotor, exhaust ports leading rrom saidmembers, nozzles to admit steam to said turbines, steam passagesconnected with the exhaust ports and nozzles, and other exhaust portsleading from said turbines.

2. In an engine of the class described, a rotor having a central recessand a passage therefrom to the periphery of said rotor, a hollow pistonheld to slide in said passage, a perforated disk in said piston, a bossheld in said recess to form steam and exhaust pr sages, a casingcarrying said boss provided with inlet ports opening into said steampassages, exhaust ports from said exhaust passages and other peripheralexhaust ports, and a stationary abutment.

3. In an engine of the class described, a rotor having a central. recessand a passage therefrom to the periphery of said rotor, a hollow pistonheld to slide in said passage, a perforated disk in said piston, valvesin said pistons, a boss held in said recess to form steam and exhaustpassages, a casing carrying said boss provided with inlet ports openinginto said steam passages, exhaust ports from said. exhaust passages andother peripheral exhaust ports, and a stationary abutment.

4. In an engine of the class described, a rotor having a central recessand a passage therefromto the periphery of said rotor, a hollow pistonheld to slidein said passage, a perforated disk in said piston, a pinmounted on said disk, a valve slidably mounted on ,said pin, a boss heldin said recess to form steam and exhaust passages, a casing carryintosaid steam passages, exhaust ports from said exhaust passages and otherperipheral exhaust ports, and a stationary abutment.

In testimony that I claim the foregoing as my own, I.have hereto aflixedmy signature in the presence of two witnesses.

AUSTIN E. KILLER. Witnesses:

J. B. Snxnrrz, C. M. DAYIS.

ing said boss provided with'ports opening

